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Localization module for missing child scenario in IoT safety domains

Lately, we observe an increase in the development of Internet of Things (IoT) systems. The interconnection of multiple devices offers improved solutions in many sectors. In the current paper, we describe the localization framework of a project that incorporates IoT technologies to face unwanted incidents in crowded spaces. The localization framework responds to the scenario of a missing child in crowded outdoor spaces and combines Received Signal Strength Indicator (RSSI), Bluetooth low energy tags and trilateration. The experimental results of trials performed in two outdoor spaces are also reported. This framework is currently being tested in the actual pilot premises.